55902240 has 72 divisors (see below), whose sum is σ = 190771308. Its totient is φ = 14906880.

The previous prime is 55902233. The next prime is 55902241. The reversal of 55902240 is 4220955.

It can be written as a sum of positive squares in 2 ways, for example, as 55890576 + 11664 = 7476^2 + 108^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (55902241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17971 + ... + 20850.

Almost surely, 2^55902240 is an apocalyptic number.

It is an amenable number.

55902240 is an abundant number, since it is smaller than the sum of its proper divisors (134869068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55902240 is a wasteful number, since it uses less digits than its factorization.

55902240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38842 (or 38831 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 55902240 is about 7476.7800556122. The cubic root of 55902240 is about 382.3634781271.

The spelling of 55902240 in words is "fifty-five million, nine hundred two thousand, two hundred forty".